Alaska Airlines Mileage Plan members can earn double miles on select flights through Nov. 15, 2011. Registration is required before flying to earn double miles on qualifying nonstop flights between Seattle and Long Beach or Edmonton; Los Angeles and Mazatlan, Mexico City, Guadalajara or Vancouver; San Francisco and Palm Springs, Los Cabos or Puerto Vallarta; San Jose and Los Cabos and between Portland and Boise or Los Angeles. Visit http://insideflyerus.wpengine.com/link/?5307 to learn more and to register.